This object specifies which of the router's configured IP addresses the multicast routing protocol on this virtual interface should bind to, with the special value 0.0.0.0 meaning it should just use whichever address came up first on the interface. An admin sets this explicitly on interfaces with multiple IP addresses to control precisely which one multicast routing associates with, rather than relying on the automatic default. For example, setting xipMRouteInterfaceAddress to 10.0.0.1 would bind multicast routing on that interface to that specific address instead of an arbitrary first address.